Stefan Keller

Stefan Keller

Stefan Keller is a historian and journalist whose works include the investigative report “Maria Theresia Wilhelm, spurlos verschwunden”, published in 1991.

What happened to Maria Theresia Wilhelm?

Stefan Keller 24.07.2025 In July 1960, a woman went missing in the St. Gallen Rhine Valley, never to be seen again. She was a psychiatric patient and the mother of seven children who had all been taken into care. The story of Maria Theresia Wilhelm and her husband Ulrich Gantenbein is a tragic tale, marred by violence and the arbitrary actions of public authorities.
Maria Theresia Wilhelm and her future husband Ulrich Gantenbein were the victims of ‘compulsory social measures’.